Chicago



V. BENDIX BRAKE CQNTRQL June 2, 1931.

Re; 1 8,083 heets-S heet Original Filed June 1, 1925 3 s INVENTOR VINCENT BENDIX hf ATTORNVEY June 2, 1931.

Original Filed June 1, 1925 V. BEN DIX BRAKE CONTROL 3 Sheets-Sheet 2 INVENTOR VINCENT BENDIX ATTORNEY sxlm c l L 3 June 2, 1931.

, Re. 18,083" Original F'iled June 1, 1925 S Sheets-Sheet 3 INVENTOR VINCENT, BENDIX BY w I ATTORNEY Reissued June 2'. 1931 UNlfrEn-l S'iA'r-Es PATENT OFFICE VINCENT BENDIX, OF CHICAGO, ILLINOIS, ASSIGNOR '.I.O BENDIX BRAKE COMPANY, 01' CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS BRAKE CONTROL Driginal l'o. 1,856,263, dated January 17, 1928, Serial No. 84,147, filed. June 1, 1925. Application for j reissue flled April 11, 1929. Serial No. 354,430.

This invention relates to brakes, and is illustrated as embodied in afront wheel automobile brake and control. An object of the invention is to provide an improved control including a. floating leve'r or the like for operating the brake, and which can shift its position automatically to equalize the pressure on the parts of the brake. The control is shown as embodyin a cam, and a lever which is forked or 0t erwise formed to receive the cam, together with'novel means for adjusting the relative angular positions of the cam and lever.

When used on a front or other swivelled wheel, I prefer to mount the control so that a art is movable from an idle position spaced From the swivelling axis to an axis substantially in that axis, means such as a pivoted lever-bein arranged to en age that part of the contro to operate it.. If it is desired to relieve the pressure on the outer brake, or

otherwise vary the braking when the wheel is swivelled, the point of engagement is in active position slightly at one side of the swivelling axis.

The controlembodies in itself substantial I I, no.velty,and;i 1i1portant features of the invention-relate totlife' arrangement for relative adgfj-us'anenmf the cam and lever, and toother novel combination of parts and desirable particular constructions which will be apparent from the following, description of 'several illustrative embodiments shown in the accompanying drawings, in which:

. "front brake and associated parts;

' Figure, 2-is ,a vertical section through the brake onthe line 22, Figure 1;

' Figure 3 is a diagram showing on an'exaggerated scale the arrangement of parts to eauseiyariation in braking when the wheel .is swivelled; Figure 4 is a sectional view cornespondin in a' general way to part of Figure 1, an

showing a modified control;

Figure 5 is an end-elevation of the parts in Fi re 4, looking from the left;

ig'ure 6 is al section on the line 6-6 of F' Lure 4,showing.aiwrei ch-indotted lines;

is a sectionalview correspondlng Figure' 'l is a vertical section through one I of the web of the shoe, and a 0011 spring 44' is Figure 11 is a section on the line 1111-,

Figure 2.

In the arrangement shown in Figures 1-3 and 11,the brake is shown as including a drum 10 on a wheel, the hub of which appears' at 12, and which is rotatably mounted on a knuckle 14 swivelled by the usual king pin at the end of the axle 16. The knuckle -14 carries the usual backing late 18 of the brake, on which are anchore at 20 and 22, respectively, the reverse and forward shoes 24 and 26 of a three-shoe brake, the third or servo shoe 28 bein connected to the forward shoe 26 at 30. prings 32 and 34 urge the shoes away from the drum. Except as further described below, the above-identified parts or their equivalents may be of any desired construction. As best appears in Figure 11, shoes 24 and 28, which are shown made of sheet-metal stampings arrangedback to back to form a shoe generally T-shaped in cross-section are formed with guide slots 36 for pins or studs 38 carried by the backing plate 18. Each stud is shouldered to support a washer 40 engaged by the web of the shoe. A second washer 42 slidable on the stud engages the other side sleeved on the stud and confined between washer 42 and a sto 46, shown held by a cotter'pin '48. The escribed pxarts form a novel and inexpensive form of w at is usually called a steady rest, for positioning the shoe laterally. p The shoes areshown in Figures 1 and 2 as operated by a double cam having projections or pintles at its ends seated in slots 52 extending inwardly from the ends of the arms of a forked lever 54. In order to provide for adjustment of cam 50.between the armsof lever 54, one arm of the lever has series of openings 56 arranged on an arc havshown in Fi ing its center in the axis of the pintles of the cam. The cam has a threaded opening, which may be brought "intoalignment with'one of the openings 56, and the adjustment 0f.the'

When use on a swivelled wheel, the lower end is formed to have a part moved from an idle position spaced from the swivelling axis cam is preserved by a pinor screw 58, as

to an active position in or immediately adjacent that axis. This part is shown in the form of a jaw embracing a ball end on a lever 60 fulcrumed on the axle or king pin. 1

If it is desired to vary the braking when the wheel is swivelled, the point of engagement between arm 54 and lever 60 or equivalent is, inactive position, slightly at one side of the swivellin'gaxis. Figure 3 is a diagram, showing of? a greatly enlarged scale, several times actual size, how the outer brake may be relieved on a'turn. The circlehas its center in the swive'llingaxis, i. e., theaxis of theking pin. W is a line through this axis parallel to the wheel when the vehicle is movmg straight ahead,'and C indicates the position at this time of the point on lever 54'engaged by lever 60.- When the wheel is swiv other tension member, instead of by lever 60, point C would be on the right side of thecircle; that is, instead of being between the wheel and the swivelling'axis it would be between the swivelling axis and the vehicle.

It will be observed that lever 54 and cam 50 are supported against axial movement of the rotary-cam by the brake shoes and against radial movement of the cam by lever 60, and is thus free to float to equalize the pressure on the shoes.

In the modification of Figures 4-6, the

cam 150 is received between the arms of a forked lever 154, and is keyed to a bolt 160,

j on which is splined a member .62 having a 62 is urged toward'the left .to turn member 62, bolt 60,

pin 158 adapted to be received in alined recesses 126 in the cam and lever. Member (Figure 4) by a spring 64 held by a threaded stop 66; As shown in Figure 6, a wrench 68 may be used to pull member 62 tothe right (Figure 4) to pull the pin 158 out of the recesses, and then and cam 150. to bring the recess in the cam opposite a different recess 126 in the lever. whereupon spring 64 again forces pin 158 into the alined recesses to preserve the adjustment. It will be observed that the backing plate 18 has a large opening 70, so that the adjustment may be made from outside the backing plate.

In the arrangement of Figures 7 and 8,

lever 254 is made of a sheet metal stamping bent to have parallel arms receiving cam 250 keyed to a bolt 260 having a polygonal end for a wrench to turn the cam. The adjustment is preserved by tightening a nut 266 against a'bushi'ng 262, which may if desired be" serrated at its end to form teeth engaging lever 254. A part 72 is riveted or spot-welded to the lever 254 to receive the end-of lever 60.

The modification of Figures 9 and 10 differs from those just described, in that the forked lever 354 receives between its arms a cam 350 which is serrated on its sides to form teeth, and which is keyed to a bolt 360 which is squared at its end for adjusting the cam. A nut 366 may be tightened against a washer 74 engaging a bushing 362 to clamp the arms of lever 354 against the teeth of the cam. Bushing 362 may be a separate part or integral with lever 354. An- I other washer 76 engaging a shoulder on the bushing 362 is arranged on the'opposite side of the backing plate 18 from the washer74, the two washers serving as guides.

Vhile several illustrative embodiments of i the invention have been described in detail, it is not my intention to limit its scope to those particular embodiments, or otherwise than by the terms of the appended claims.

I claim: 1

1. A vehicle having an axle and a wheel mounted for swivelling movement at the end of the axle, together with retarding means comprising, in combination with said parts,

a drum rotating with they wheel, an expansible friction device within the drum having adjacent free ends, a floating member having a cam part between said free ends and having another part movable in applying the brake toward the swivelling axis from an idle position spaced some distance from the swivelling axis, and means engaging the other part of said member for operating the retarding means.

2. A vehicle having. an axle and a wheel mounted for swivelling movement at the end of the axle, together with retarding means comprising, in combination with said parts,

a drum rotating with the wheel, an expansible friction device within the drum. having adjacent free ends, a floating member hav-i ing a cam partbetween said free ends and having another part movable in applying the brake toward the swivelling axis r'om an idle position spaced some distance from the swivelling axis, and a pivoted lever with one end engaging the other part of said member for operating the retarding means.

3. A. vehicle having an axle and a wheel mounted for swivelling movement at the end of the axle. together with retarding means comprising, in combination withsaid parts, a

drum rotating with the wheel, an expansible friction device within the drum having ad] acent free ends, a member having arms atop-- gaging the ends of the friction device, and means engaging said part of the member for operating the retarding means.

4. A brake comprising friction means having adjacent separable ends, a floating brakeapplying device having a cam member between said ends and having an operating arm connected to and extending from the .cam member, and applying means operatively engaging the end ofthe arm and with the ends of the friction means to support said device.

5. A brake com rising, in combination, a drum, an e ansi le friction device within the drum inc uding arts arranged for movement in oppositeilirections to apply the brake, a member havin arms at opposite sides of said parts, an a cam adjustably mounted between the arms and engaging said parts.

6. A brake comprising friction means having adjacent separable ends, a floating brakeapplying device having a cam member between said ends and having an operating arm. connected to and extendin from the cam, and applying means including a horizontally extendin second lever having its end connected to tl i e end ofthe operating arm and with the ends of the friction means 'serving to su iport said device. e v 7. vehicle having an axle and a wheel mounted for swivelli'ng movement at the end of the axle, together with retarding means comprising, in.combination with said parts,

a drum rotating with the wheel, an expansible friction device within the drum, a floating member for expanding said device and having a part movable rem an idle position spaced from the swivellin axis to a osition immediately adjacent sai axis, an means engaging said part of the member for operating t e retarding means, the point of engagement in active position being so arranged with respect to the swiveling axis that the retardin effect is varied when the wheel is swivelle I 8. A vehiclehaving an axle and a wheel mounted for swivelling movement at the end of the axle, together with retarding means comprising, in combination 'with sa1d parts, a drum rotating with the wheel, an ex ansible friction device within the drum a oating member for ex anding said device and havin a part movable from an idle position space from the swivellin axis to a position immediately adjacent sai axis, and a lever engaging said part of the member for operating the retarding means, the point of engagement in active position being swivelling axis and the wheel, to relieve the pressure on the friction device when the wheel is on the outside of a turn.

9. A brake comprisin in combination, a drum, an expansible friction device within the drum, a cam for expanding said device, and an arm for operating the cam and on which arm the cam is pivotally mounted, the

.arm and cam having a pin and series of recesse's for adjusting their relative angular positions.

10. A brake comprising, in combination, a drum, an expansible friction device within the drum, a cam for expanding said device, an arm for operating the cam and on which arm the cam is pivotally mounted, the arm and cam having a pin and series of recesses for adjusting their relative angular positions, and means for shifting the pin from one recess to another.

11. A brake control comprising, in combination, a forked lever, and a cam adjustably mounted between the arms of the lever.

12. A brake control comprising, in combination, a forked lever, and a cam adj ust-able between the arms of the lever without removal. i

13. A brake control device including a forked lever. having an arcuate series of openings in one of its arms for an adjusting pin, and having in both arms pivot bearings coaxial with respect to said series.

14. A brake comprising, in combination, a drum, an expansiblefriction device within the drum including parts arranged for movement in opposite directions to apply the between the v brake, a forked operating member having arms at opposite sides of said parts, and means adj ustably mounted between the arms for engagin sa1d parts.

15. A bra e control comprising, in combination, a cam, an arm for operating the cam, the cam and arm havingrecesses, and a separate spring-held member havinga pin arranged for insertion in alined recesses in the cam and arm.

16. A brake control comprising, in combination, a cam, an arm for operating the cam,

the cam and arm having recesses, a member having a pin arranged for insertion in alined recesses in the cam and arm, and a spring urging said member in a direction to hold the pin in the recesses.

17. A brake control comprising, in com,-

bination, a cam, an arm for operating the cam, the cam andarm having recesses, a member having a pin arranged for insertion in alined recesses in the cam and arm, and aspring urging said member in a direction to hold the pin in the recesses, the member being movable against the resistance of the spring to withdraw the pin from the recesses to permi t relative angular adjustment of the cam and arm.- 7

18. A brake control comprising, in combination, a cam, an arm .for operating the cam, the cam and arm having recesses, a member having a pinarranged for insertion in alined recesses in the cam and arm, and a spring urging said member in a direction to hold the pin in the recesses,-the member being movable against the resistance of the spring to withdraw the pin from the recesses to permit relative angular adjustment of the cam and arm, and having flat surfaces for engagement .by a wrench to move it as described.

19. A brake control comprising, in combination, a cam, a device for operating the cam, the cam and said device having recesses, a member movable, axially, of the cam but connected to the cam to prevent relative angular movement, a pin carried b the member received in alined recesses in t e cam and said device, anda spring urging the pin into the recesses, said member being operable to withdraw the pin against the resistance of the spring and to turn the cam with respect to said device for adjustment.

20. A brake control comprising, in combination, a forked lever, a cam between the arms of the lever, and means outside of the fork for turning the cam between said arms.

21. A brake control comprising, in combination, a forked lever, acam between the arms of the lever, apart connected to the cam and proecting through one of the arms and operable to turn the cam between the arms, and means adjustable to prevent relative angular movement of the lever and cam.

A brake control comprising, in combination, a forked lever,.a cam between the arms of the lever, a part connected to the cam and projecting through one of the arms and'operable to turn'the cam between the arms,

and means togconnect the lever and said part -.to.pivent relative angular movement of the cam and leve'r'iwhen the control is in use.

23. K brake'comprising, in combination, a

I -drum, a backing plate, a friction; device between the drum and backing plate, a cam for operating the friction'de'vice, a forked lever embracingthe cam, and means connecting the ,cam ancllever and'arranged to be 0 erated from outside the backing plate to ad ust the cam with respect to the lever.

- 24, 'Agjgbrakecom rising, in combination, a

drum a' backing p ate having an opening, a

. frictioii device between the drum and backing plate, a cam for operating the friction devic e,a forked lever embracing the cam, and

means connecting the cam and lever and including parts projecting through the opening inthe backing platean'd operable to adjust the/cam with respect-to the lever.

25. A brake coin'prising, in combination, a

Q drum, a backing plate, friction means bes drum, an eXpansible friction device within the drum having parts arranged for move- 'ment in opposite directions to apply the brake, a member having arms at opposite sides of said parts, and means adjustably mounted between the arms for engaging the parts to apply the brake.

28. A brake comprising, in combination, a drum, a backing plate, an expansible friction device within the drum having free ends arranged for movement in opposite directions to apply the brake, a member-having arms at opposite sides of said parts, means mounted between the arms for engaging the parts to applythe brake, and means for holding said free ends laterally with respect to the backing plate. 1

' 29. A brake comprising, in combination, a drum, a friction device engageable with the drum, a brake-applying device including an operating arm which is unsupported a'gai-nst radial movement at the end adjacent the friction device, and means for rocking the arm, which means is constructed and' arranged to slidably support the arm against radial movement.

30. A brake comprising, in combination, a

drum,"a friction device engageable with the drum, a floating brake-applying device including a lever having a fork at its free end, and a member for rocking the lever to apply said device and which is received in said fork to support the floating device and lever.

31. A brake comprising, in combination, friction means having separable ends, a floating lever arranged generally radially of the brake and having thrust means acting on said ends and shiftable bodily to'balance the pressures on said ends, and'operating meansv pivotally connected to the inner end of said 4 floating lever and supporting said lever against lengthwise movement radially of the drum the floatin lever being supported axially by said'en erating means.

32. A brake comprising, in combination",

friction means having separable ends, a floating lever arranged generally radially of the brake and havin thrust means acting on said 'ends and shiftable bodily both angularly. and axially to balance the. pressures and radially by'said opr' on said-ends, and another lever pivotally connected to the inner end of said floating lever and operating the floating lever to apply the brake.

33. A brake comprising, in combination, friction means having separable ends, a floating'lever arranged generally radially of the brake and havm thrust means acting on said ends. and shi table bodily to balance the pressures on said ends, and an operating lever mounted on a fixed pivot and having its end slidably and pivotal connected to the inner end of said floating lever. p 3a. A brake comprising, in combination, u friction means having separable ends, a floating lever arranged generally'radially of the brake and having thrust means acting on a said ends andishiftable bodily to balance the pressureslon said ends, and means for operating the floating levger including an operatin lever movable in apl'ane: nerally perpen icular to the plane of the rake. l

35. Brake-applying means comprising a floating shoe-engaging lever device and an .operatm lever which are pjvotally connected and whic are arranged u stantiallyatright, angles to'each other.' 36. Brake-appl g, means comprising an operatin lever'and a floating leverpivoted Q at its en to the operating; lever and formed at least at. itsother end with spaced portions. between which is pivoted shoe-engaging thrusbmeans.

'37. Brake-applyi ng means comprising an ll operatin lever and a floating-lever pivoted j at its en to the operatin level? and formed at least at its other end with spaced portions between. which is mounted shoe-engaging ,thrust means. 1

O i 38. Brake-applying means comprising two spivotally-connected relatively-perpendlcular I the friction meansends, for axiailtlg 7 porting the lever.

having separable ends, a fibating lever forseparating the ends, saiddeve'r having spaced side/portions arranged on opposite sides of the friction means ends foraxially support- 4 3, brake comprising frictionmeans having separable'ends, afloatingrlever for se arating the ends, said lever having spaced si e portions arranged ,onopposite sides of supporting the lever, and a ball joint r In testimony whereof, I have" hereunto signedmy name.

' VINCENT BENDIX.

l ially sup- 7.

levers, one of which is mounted for move-- I ment about a. fixed axis and the other of which is floating except for its connection to he first lev'er.- I I v 39. Brake-applyingemeans comprising two 1 pivotally-connected vers, one 0fWh10h 1s mounted for movement about a fixed axis and the other of which is floating exce t for its I connection to the first lever, said -men- 'tioned lever movablein a plane ,perpendicw' lar, to the plane of the second-mentioned lever. a T y 40. A brake comprisi having separable ends, a oating lever for the ends, said lever being axially friction mean sf- I separatin supportef by the friction means, and means for'radially' supporting the lever.

41.A brake com nsin% friction means nhaving, separable en a mating lever for separat' the en said lever bemg axially suppo by the 'ction means, and iimversal joint means for radially supporting the lever.

O 42. A 'b'rake friction means 

